alexa Determination of 5-fluorouracil in plasma with HPLC-tandem mass spectrometry.
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): van Kuilenburg AB, van Lenthe H, Maring JG, van Gennip AH

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Abstract In this article, we describe a fast and specific method to measure 5FU with HPLC tandem-mass spectrometry. Reversed-phase HPLC was combined with electrospray ionization tandem mass spectrometry and detection was performed by multiple-reaction monitoring. Stable-isotope-labeled 5FU (1,3-15N2-5FU) was used as an internal standard. 5FU was measured within a single analytical run of 16 min with a lower limit of detection of 0.05 microM. The intra-assay variation and inter-assay variation of plasma with added 5FU (1 microM, 10 microM, 100 microM) was less then 6\%. Recoveries of the added 5FU in plasma were > 97\%. Analysis of the 5FU levels in plasma samples from patients with the HPLC tandem mass spectrometry method and a HPLC-UV method yielded comparable results (r2 = 0.98). Thus, HPLC with electrospray ionization tandem mass spectrometry allows the rapid analysis of 5FU levels in plasma and could, therefore, be used for therapeutic drug monitoring. This article was published in Nucleosides Nucleotides Nucleic Acids and referenced in Journal of Chromatography & Separation Techniques

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